Building control system



FIG. 1 shows a front perspective view of my design for an buildingcontrol system;

FIG. 2 shows a front view thereof;

FIG. 3 shows a right side perspective view thereof; and,

FIG. 4 shows a left side perspective view thereof.

The back and bottom views form no part of the invention.

The ornamental design for an building control system, as shown anddescribed.